JP2008226814A - Compact self-ballasted fluorescent lamp and lighting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact self-ballasted fluorescent lamp which is provided with a light-emitting tube which can make a portion corresponding to a root portion of a general lighting bulb as small as possible, and to provide a lighting apparatus equipped with the lamp. <P>SOLUTION: The light emitting tube 1 is provided with a bulb 2 on at least a portion of which a spiral-shaped portion 10 is formed and on both ends of the bulb, electrodes 20a, 20b are sealed and a discharging passage is formed inside, and both ends of the bulb face each other at the inner position than a maximum outside diameter D1 of the spiral shaped portion and a minimum dimension a between each of the facing inside surfaces is 5 to 15 mm. The compact self-ballasted fluorescent lamp is provided with a lighting unit 40 to that makes the light-emitting tube light, a covering member 50 which supports the light-emitting tube in itself and in which the lighting unit is arranged, and a mouthpiece 60 supported by the covering member. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a light bulb-type fluorescent lamp having an arc tube that can be used in place of an existing general lighting bulb and a lighting fixture using the light bulb-type fluorescent lamp.

A holder is provided on a base that can be attached to a socket of a general lighting bulb such as an incandescent bulb, and an arc tube and a lighting device formed by bending a glass tube bulb are attached to the holder. Covered bulb-type fluorescent lamps are known.

In recent years, in order to reduce the size and increase the output, an arc tube arranged in a narrow space in a globe is bent in a spiral shape to increase the discharge path length (for example, (See Patent Documents 1 and 2).
JP 2003-263972 A JP 2006-222079 A

In the bulb-shaped fluorescent lamps shown in Patent Documents 1 and 2, the spiral-shaped arc tube is arranged with both ends of the bulb serving as the end of the spiral facing each other, and the dimension between the opposed inner surfaces is substantially the same as the inner diameter dimension of the spiral. It is structured equally.

As shown in Patent Document 1, particularly FIGS. 3 and 4, when the valve is formed into a spiral, after the valve temperature has dropped, the forming jig is pulled out while rotating backward, and then the valve end is removed. Since it is processed into a predetermined shape, the dimension between the inner surfaces facing each other at both ends of the valve, which is the end of the spiral, is configured to be approximately equal to the inner diameter dimension of the spiral to facilitate processing. In other words, the terminal portion (lower portion) of the spiral arc tube is formed with the outer diameter of the spiral.

For this reason, the holder for supporting the arc tube is inevitably larger than the outer diameter of the spiral. When configuring the holder to approximate the silhouette of a general lighting bulb such as an incandescent bulb,
Since it is arranged corresponding to the narrow base part of the globe, the base part of the conventional light bulb-type fluorescent lamp is thickened by that amount, and has a different silhouette from the external shape of the incandescent light bulb.

In this way, thinning the base portion of the bulb-type fluorescent lamp is the most important issue in miniaturization of a bulb-type fluorescent lamp that is replaced with an incandescent bulb.

The present invention has been made in order to address the above-described problems, and uses a bulb-type fluorescent lamp having an arc tube capable of minimizing a portion corresponding to the root portion of a general lighting bulb, and the lamp. It aims at providing a lighting fixture.

The invention of the bulb-type fluorescent lamp according to claim 1 has a bulb in which a spiral portion is formed at least in part, and electrodes are respectively sealed at both ends of the bulb to form a discharge path inside.
Both end portions of the valve are opposed to each other at an inner position than the maximum outer diameter of the spiral portion, and the minimum dimension between the opposing inner surfaces is 5
An arc tube having a diameter of ˜15 mm; a lighting device for lighting the arc tube; a cover member that supports the arc tube and in which the lighting device is disposed; and a base that is supported by the cover member; It is characterized by.

According to the present invention, it becomes possible to make the portion corresponding to the root portion of the lamp as small as possible,
A light bulb-type fluorescent lamp that is similar to an ordinary light bulb such as an incandescent light bulb or can be downsized to the same shape is configured.

The spiral portion of the valve is formed by bending one straight tubular member into approximately two equal parts in the longitudinal direction and bending it into a spiral shape with the approximate center of the straight tubular member divided into two as the top. You may make it comprise what is called a double discharge path.

  Furthermore, the straight tubular member is bent in a spiral shape up to about 2/3 of the straight tubular member from the one end side toward the other end, which is the top, and the remaining 1/3 straight tubular member is formed in a spiral shape. It may be shaped to extend in one end direction through the substantially central axis formed.

Furthermore, in order to approximate the appearance shape to the silhouette of an incandescent bulb, it is located on the top end side including the maximum diameter part of the globe and has a substantially truncated cone shape having at least a part of a spiral diameter part larger than the reduced diameter part of the globe. Or a helical shape having a substantially spherical shape.

In addition, the electrode sealing portion in which the electrode is sealed is formed to have a predetermined length so as to form a short discharge path portion, and is configured in a shape in which a linear portion is combined with a spiral portion. It may be.

The electrode sealing portion is formed by extending both ends of the bulb in a straight line so that they are substantially parallel to each other, or in a curved shape inclined obliquely toward the extending direction of the spiral. Also good.

The minimum dimension between the opposing inner surfaces is 5 to 15 mm, preferably 7 to 12 mm.

For example, the lighting device may be configured by a circuit board including an inverter circuit mainly composed of electronic components that turn on the arc tube by applying high-frequency power of 10 kHz or more.

The cover member includes a holder that supports the arc tube, a partition that supports the circuit board of the lighting device, and
You may comprise with the cover which supports a nozzle | cap | die.

The cover member may be configured by supporting the circuit board of the lighting device with, for example, a synthetic resin holder having electrical insulation, omitting the partition body, and the holder and cover. The number of members is not limited, and all members that support the arc tube and in which the lighting device is disposed are allowed.

As the base, any base that can be attached to a socket to which a general lighting bulb is mounted, such as a screw-type base referred to as an E type that is normally used, is allowed.

  According to a second aspect of the present invention, in the bulb-type fluorescent lamp according to the first aspect, the arc tube has a maximum outer diameter of the spiral portion of 36 to 40 mm, and a part of the cover member is exposed to the outside and is heated. It has a holder composed of a conductive member, and the outer diameter of the holder is 40 to 44 mm, and the dimension of the holder from the board surface supporting the arc tube to the outer peripheral surface part of which is partially exposed outward is 4 to 8 mm. It is characterized by that.

According to the present invention, it becomes possible to make the portion corresponding to the root portion of the lamp as small as possible,
A light bulb-type fluorescent lamp that is similar to an ordinary light bulb such as an incandescent light bulb or can be downsized to the same shape is configured.

  A holder made of a member that is partially exposed to the outside and has thermal conductivity is made of at least one of aluminum (Al), copper (Cu), iron (Fe), and nickel (Ni) having good thermal conductivity. It is preferable to form with the metal containing. In addition, it may be made of an industrial material such as aluminum nitride (AlN) or silicone carbide (SiC), or may be made of a synthetic resin such as a high thermal conductive resin.

  The holder is allowed to have a dimension of 4 to 8 mm, preferably 5 to 7 mm, from the board surface supporting the arc tube to the outer peripheral surface part of which is exposed to the outside. The outer peripheral surface part of which is exposed to the outside is preferably a part that supports the glove on its inner peripheral part, but in the case of a globeless bulb-type fluorescent lamp, it is necessary to be a part that supports the glove. There is no sex. In short, the height dimension from the portion where the light emitted from the arc tube toward the outer periphery of the holder is shielded to the board surface may be used.

  According to a third aspect of the present invention, in the bulb-type fluorescent lamp according to the first or second aspect, the bulb has at least one electrode sealing portion connected to the inside of the bulb and the other end sealed to the inside. It is characterized by the provision of a straight tubule enclosing a mercury emitter.

The thin tube does not need to be a strict straight line, and may be a substantially straight line such as a substantially straight line having a gentle curve as a whole.

The thin tube may be formed by integrally reducing the diameter from the end of the bulb into a tubular shape, or may be a sealed small tube having a small diameter that communicates with the inside of the bulb. The material may be the same as or different from the valve. Further, it may be used for exhaust of the arc tube.

As the mercury emitter, an amalgam for controlling the vapor pressure of mercury may be used, but an amalgam for quantitative encapsulation or pure mercury may be used.

  According to a fourth aspect of the present invention, there is provided the light-emitting fluorescent lamp according to any one of the first to third aspects, wherein the cover member is a light emitting element formed of a member that is exposed to the outside and has thermal conductivity. It is characterized by comprising a holder that supports the tube, a partition that supports the circuit board of the lighting device, and a cover that supports the base.

You may comprise a partition and a cover with cheap engineering plastics, such as a synthetic resin which has electrical and thermal insulation, for example, PBT (polybutylene terephthalate).

The invention according to claim 5 is the light bulb shaped fluorescent lamp according to claim 4, wherein the holder is
Formed a substantially disk shape with a notch in the corner of the board surface, formed a hook-like part exposed to the outside on the outer periphery, supported the arc tube on the board surface and supported the globe on the inner surface of the bowl-like part It is characterized by.

The substantially disk shape formed by the holder does not have to be a geometrically exact circle, but an octagon,
It may have a polygonal shape such as a hexagonal shape, and may have a substantially disk shape within a range allowed from the appearance, design viewpoint, etc., with respect to the shape of a light bulb having a circular cross section.

The substantially disk shape in which the notched inclined portion is formed at the corner of the board surface may be formed by notching the corner of the board surface linearly or by notching it into an R (circle) shape. Further, the entire circumference of the corners of the board surface, or substantially the whole circumference may be inclined. The inclined portion may add an inclined portion made of another member such as silicone resin to the upper surface of the board surface continuously or discontinuously with the inclined portion.

The structure for supporting the arc tube on the holder is not particularly limited. For example, a support hole penetrating the disk surface having a substantially disk shape may be formed, and the end of the arc tube may be inserted into the support hole and supported.
Alternatively, a supporting recess may be formed without forming a support hole that penetrates, and the end of the arc tube may be fitted into and supported by the recess.

The hook-shaped portion is preferably provided so as to form a continuous ring shape over the entire circumference of the outer peripheral portion of the board surface, but it is not a condition that the ring shape is continuous over the entire circumference, and part of the ring is not required. The shape lacking continuously may be used.

The globe is made of a material such as glass or translucent synthetic resin, and may be provided with means such as colorless and transparent, colored or diffused according to the required properties. Reflecting means such as a reflective film may be formed in part.

The invention of the lighting apparatus according to claim 6 includes: an apparatus main body; a socket provided on the apparatus main body;
The bulb-type fluorescent lamp according to any one of claims 1 to 5, wherein a base is connected to the socket;
It is characterized by comprising.

According to the present invention, since the light bulb type fluorescent lamp that can be approximated to the same shape as a general lighting bulb such as an incandescent bulb or can be miniaturized to the same shape is used, the light distribution of the fixture is changed to that of a general lighting bulb such as an incandescent bulb. It can be similar or identical to light.

The main body of the fixture is directly attached to the ceiling, suspended from the ceiling, or mounted on the wall, etc. Even if a glove, shade, reflector, etc. can be attached to the body as a light control body, the bulb-type fluorescent lamp is exposed. It may be a thing. Moreover, the lighting fixture is not limited to a single bulb-type fluorescent lamp attached to the fixture body, and a plurality of lighting fixtures may be provided.

According to the first aspect of the present invention, the base of the lamp is formed by the arc tube in which both end portions of the bulb are opposed to each other at an inner position from the maximum outer diameter of the spiral portion and the minimum dimension between the opposing inner surfaces is 5 to 15 mm. Therefore, it is possible to provide a light bulb-type fluorescent lamp that can be made as small as possible, and that can be reduced in size to the same shape or similar to a general lighting bulb such as an incandescent bulb.

  According to the second aspect of the present invention, the dimension of the holder from the surface supporting the arc tube to the outer peripheral surface part of which is partially exposed to the outside is 4 to 8 mm, so that the part corresponding to the base part of the lamp Therefore, it is possible to provide a light bulb-type fluorescent lamp that is similar to a general lighting bulb such as an incandescent bulb or that can be miniaturized to the same shape.

According to the third aspect of the present invention, there is provided a linear thin tube having one end communicating with at least one electrode sealing portion and the other end sealed and enclosing a mercury emitter inside. In addition, it is possible to provide an arc tube that can be reduced in size to an approximate shape or the same shape as a general lighting bulb such as an incandescent bulb and that has improved luminous flux rise characteristics.

According to the fourth aspect of the present invention, it is possible to provide a light bulb-type fluorescent lamp that can be reduced to a size similar to or equal to that of a general illumination light bulb such as an incandescent light bulb and has improved heat dissipation characteristics.

According to the fifth aspect of the present invention, it is possible to provide a light bulb-type fluorescent lamp that can be reduced in size to the same shape or approximate to that of a general lighting bulb such as an incandescent bulb and improved in the dark portion of the root portion.

According to the sixth aspect of the present invention, since the light bulb-type fluorescent lamp that is similar to the general lighting bulb such as an incandescent bulb or that can be downsized to the same shape is used, the light distribution of the appliance is a general lighting such as an incandescent bulb. It can be approximated or the same as the light distribution of a light bulb, and a sufficient amount of light can be applied to the reflector in the vicinity of the socket arranged in the luminaire to obtain the instrument characteristics as the optical design of the reflector. be able to.

  Embodiments of a bulb-type fluorescent lamp and a lighting fixture according to the present invention will be described below.

In this example, a bulb-type fluorescent lamp corresponding to an incandescent bulb 100 W type using an arc tube having a spiral portion and a downlight-type lighting fixture using the lamp are configured.
Hereinafter, the configuration of the arc tube will be described.

The arc tube 1 is made of a glass bulb 2, and has a spiral portion 10 and electrode sealing portions 20, 20 'formed at both ends of the bulb.

The spiral portion 10 is a straight tubular member obtained by bending a valve made of a single straight circular tube-shaped transparent lead-free glass having an outer diameter of about 10 mm into approximately equal halves in its longitudinal direction, and then bisecting the bulb. The center of the top 1
As 0a, both ends of the bulb are wound around a forming jig (not shown) to form a spiral curve,
Molding into a substantially cylindrical double spiral.

Further, both end portions 10b and 10c of the bulb are bent from a double spiral-shaped spiral end substantially parallel to the spiral pivot axis (lamp axis oo) toward the opposite side of the top portion 10a at a substantially right angle to form a pair of straight lines. Forming part. The both end portions 10b and 10c having the straight portions are projected in parallel with each other, and the end portions 10b and 10c are close to each other toward the lamp axis oo, in other words, the final end portion of the spiral is It is bent so as to wrap around inside. In addition, the bending process of the both ends of the valve is performed after the forming jig is pulled out from the spiral portion 10.

As a result, both end portions 10b and 10c of the valve having the spiral portion 10 are opposed to each other at an inner position from the maximum outer diameter D1 of the spiral portion 10 and are close to each other, in other words, the final end portion of the spiral. Are arranged so as to face each other inward and the minimum dimension a between the opposing inner surfaces is 5
It is configured to be ˜15 mm, preferably 7 to 12 mm. In this embodiment, it is set to about 10 mm.

A pair of electrodes 20a and 20b are provided at both ends 10b and 10c of the valve configured as described above.
The electrode sealing portions 20 and 20 'are formed by sealing each other. As a result, the spiral portion 10 and both end portions 10b and 10c are continuous, the electrode sealing end portions 20 and 20 'are provided at both end portions, and one long discharge path is formed inside.

If the dimension a between the opposing inner surfaces is less than 5 mm, the temperature of the electrode portion becomes high, and the electrode is likely to be thermally deteriorated. In addition, the temperature of the auxiliary amalgam or the like enclosed in the bulb end also increases, and it becomes difficult to obtain the desired light emission characteristics. Further, the vicinity of the electrode is likely to be abnormally heated at the end of the life of the arc tube.

On the other hand, when the dimension a between the opposed inner surfaces exceeds 15 mm, the distance from the glove root portion becomes short, and both end portions appear as shadows on the glove. In particular, since the portion near the electrode that is the base portion includes a portion that does not emit light, a shadow is easily reflected due to the difference in brightness. On the other hand, if the base of the glove is moved away, shadows will not be produced, but the neck of the lamp will become thicker and it will not be possible to approximate the incandescent bulb silhouette. In addition, the strength of the arc tube, particularly the strength in the opening direction at both ends, is reduced and is easily damaged.

As the pair of electrodes 20a and 20b, for example, a filament coil electrode made of tungsten is used. For example, the electrodes 20a and 20b are sealed to the electrode sealing portions 20 and 20 ′ in a state of being temporarily fixed by, for example, bead glass.

One electrode sealing portion 20 is provided with a narrow tube 21 protruding from one end and sealed at the other end. The thin tube 21 is a transparent lead-free glass similar to the glass constituting the bulb 2 and is formed in a straight line parallel to the lamp axis oo and encloses a main amalgam 21a which is a mercury emitter. . The other electrode sealing portion 20 ′ is provided with a short thin tube 22 that forms an exhaust pipe.

A phosphor film such as rare earth is formed on the inner surface of the bulb 2 over almost the entire length, and a discharge medium such as argon or krypton is enclosed inside.

As described above, both end portions of the bulb having the spiral portion 10, that is, the electrode sealing portions 20, 20
′ Is opposed to and close to the maximum outer diameter D1 of the spiral portion 10, in other words,
The arc tube 1 is formed in a substantially cylindrical shape in which the outer diameter of the lower part of the spiral portion is reduced so that the final end portion of the spiral is turned inward. As will be described later, when the bulb-type fluorescent lamp is configured using the arc tube, the portion where the outer diameter is reduced is a position corresponding to the root portion N having substantially the same shape as the incandescent bulb.

 An example of a specific configuration of the arc tube 1 configured as described above is as follows. That is, the outer diameter of the tube of the bulb is about 10 mm, the maximum outer diameter D1 of the spiral portion 10 is about 40 mm, the height H1 is about 76 mm, and the dimensions between the opposing inner surfaces facing the electrode sealing portions 20 and 20 ′. a is about 10 mm, the dimension b between the outer surfaces of the electrode sealing portions 20 and 20 ′ facing each other is about 30 mm, the discharge path length between the pair of electrodes 22 a and 20 b is about 580 mm, and the rated lamp power is about 21 W.

Next, the configuration of a bulb-type fluorescent lamp using the arc tube configured as described above will be described. In the following description, the arc tube is the upper side and the base is the lower side.

The bulb-type fluorescent lamp 30 includes the arc tube 1 having the above-described configuration, a lighting device 40 that lights the arc tube, a cover member 50 that supports the arc tube and has the lighting device disposed therein, a base 60 that is supported by the cover member, and a globe. 70, and has the same appearance as a general lighting bulb such as a 100 W type incandescent bulb. This general lighting bulb is defined in JIS C 7501.

The cover member 50 is composed of a member that is partially exposed to the outside and has thermal conductivity, and supports a holder 51 that supports the arc tube 1, a partition body 52 that supports the circuit board of the lighting device 40, and a base. The cover 53 is configured.

The holder 51 is made of a metal having a thermal conductivity of 10 W / m · k or more, and in this embodiment is made of aluminum die-casting so as to have a substantially disk shape, and serves as a support portion for the arc tube 1 on the upper surface forming the disk surface of the disk. A pair of support holes 51a and 51a are formed to penetrate.

Note that, as described above, the arc tube 1 has the electrode sealing portions 20 and 20 ′ having the helical portion 10 having the maximum outer diameter D.
Since the minimum dimension a between the opposed inner surfaces is set to about 10 mm, the distance between the pair of support holes 51a and 51a can be small, and the holder 51 is small. Can be used.

Further, a space 51b having an opening is formed on the lower surface of the disk, and a ring-shaped bowl-shaped part 51c that is exposed outwardly on the outer periphery of the disk protrudes obliquely upward and outward. Integrally formed. On the inner surface of the ring-shaped bowl-shaped portion, a concave portion 51d formed of a ring-shaped groove is integrally formed over the entire periphery, and a ring-shaped step portion 51e is integrally formed over the entire lower periphery of the outer surface.

In addition, the inclined portion 51f is integrally formed with a shape in which corners on the outer periphery of the board are cut out over the entire circumference. In addition, the shape of the inclined portion 51f may be a shape in which an inclined portion is formed by cutting into an R shape (quarter circle). Alternatively, the entire circumference may be inclined leaving a part of the corner of the board surface.

The lower end portions of both ends 10b and 10c of the arc tube are inserted into the pair of support holes 51a and 51a of the holder 51, and a heat resistant material such as a silicone resin or an epoxy resin is provided around the outer surface of each end of the support hole and the arc tube. The adhesive is applied and fixed.

As a result, the arc tube 1 is supported on the upper surface of the holder 51, with both end portions 10b and 10c facing the upper portion of the inclined portion 51f. Also, both ends 10b, 10c having the arc tube electrodes and the holder 51 are thermally connected by the adhesive, and the heat of the arc tube is efficiently conducted to the holder and effectively radiated.

At this time, both end portions 10b and 10c of the arc tube are supported in a state facing the inclined portion 51f with the corners cut off, and light emitted from the vicinity of both end portions (near the electrodes) is blocked by the corners of the holder. Therefore, the vicinity of the base of the globe 70 is not easily darkened. (Figures 2 and 3 arrows)
Since the upper surface which becomes the board surface of the holder 51 is made of aluminum, this surface becomes a light reflecting surface, and light emitted downward from the arc tube 1 is reflected upward by the upper surface of the aluminum, and further, light loss is caused. Does not occur.

In addition, the lead wires w1 and w2 of the arc tube 1 are led out into the space 51b of the holder 51, and further, the thin tube 21 is disposed in a state of protruding downward.

The partition body 52 has a substantially disk shape, for example, polybutylene terephthalate (PB).
T), which is made of a heat-resistant synthetic resin material, and the upper surface forming the disk surface of the disk is the partition plate portion 52a.
And a cylindrical body portion having a mounting portion 52b protruding outward in a bowl shape is integrally formed, and a space portion 52c having an opening is integrally formed on the lower surface of the disk.

A cylindrical body portion of the partition body 52 has a recess 52d for inserting a wrapping tool by notching a side wall of the cylinder portion at a position facing a wrapping pin 40c provided to project from a circuit board 40a described later.
Are integrally formed. (Fig. 2, Fig. 5)
The recess 52d has a shape and a size into which a lapping tool can be inserted, and is formed at two locations corresponding to the pair of lapping pins, respectively, with respect to the lapping pins 40c provided in total of four pairs.

The partition plate portion 52a has insertion holes 52e through which the thin tubes 21 and 22 projecting outward from the pair of electrode sealing portions 20 and 20 'of the arc tube 1 and the outer wires w1 and w2 are inserted.
Is formed.

A pair of locking grooves 52f and 52f for supporting a circuit board 40a of a lighting circuit, which will be described later, in the vertical direction are integrally formed on the inner peripheral surface of the partition body 52.

In addition, although the holder 51 and the partition 52 which were mentioned above were comprised separately, the incandescent lamp 40W and 60W
In the case of a comparatively low watt bulb-type fluorescent lamp corresponding to a type or the like, it may be integrally formed of a synthetic resin such as PBT and configured as one component.

The cover 53 is formed in a cylindrical shape having openings at both ends of a heat-resistant synthetic resin material such as polybutylene terephthalate (PBT), and an annular mounting step 53a is formed at the upper opening.
Form.

On the inner peripheral surface of the lower end opening of the cover 53, a pair of locking grooves 53b and 53b for supporting a circuit board 40a of a lighting circuit to be described later in the vertical direction and a notch 53 for inserting and locking the narrow tube 21 are provided.
c is formed integrally. (Fig. 4)
A shell 60 a of a base 60 described later is attached to the outer peripheral surface of the lower end opening of the cover 53.

A hook-shaped mounting portion 52 b of the partition 52 is fitted and supported on the mounting step portion 53 a of the cover 53. Further, on the inner surface of the cover, the recesses 52d and 52d for inserting the wrapping tool formed in the partition body 52 described above are closed, and projecting pieces 53d and 53d mainly for electrical insulation of the wrapping pin portion are integrally formed. . (Fig. 4)
The projecting piece portions are opposed to the recesses 52d and 52d formed at two locations of the partition body 52 to form two projecting piece portions.

The base 60 is formed of an Edison type E26 type or the like, and has a cylindrical shell 6 with a thread.
0a is provided with an eyelet 60c provided on the top of one end side of the shell via an insulating portion 60b.

The shell 60a is made of a conductive metal, and the other end is covered with the outer peripheral surface of the lower end opening of the cover 53, and is fixed by means of heat-resistant adhesive such as silicone resin or epoxy resin, or caulking.

The lighting device 40 includes a circuit board 40a, and an electronic component 40b constituting a lighting circuit such as an inverter for lighting the arc tube by applying high frequency power of 10 kHz or more to the circuit board is mounted.

The circuit board 40a has a vertically long rectangular shape in which the upper width is wider than the lower width so that the upper side is inserted into the space 52c of the partition body 52 and the lower side is vertically inserted into the base 60. Constitute.

The circuit board 40a has both side edges in the width direction with the circuit board in the vertical direction in the locking grooves 52f and 52f formed on the inner surface of the partition 52 and the pair of locking grooves 53b and 53b formed on the inner surface of the cover 53. Insert and fix the part.

At this time, the circuit board 40 a is arranged so as to be shifted to one side with respect to the central axis oo of the holder 51, the partition body 52, and the cover 53. (Figure 2)
A circuit pattern is formed on one or both sides of the circuit board 40a, and a plurality of electronic components 40b for constituting a lighting circuit such as a lead component such as an electrolytic capacitor and a chip component such as a transistor are formed on the mounting surface. ... is implemented.

Further, a plurality of wrapping pins 40c are provided so as to project from one side of the circuit board 40a, that is, one side located on the narrow space side of the circuit board disposed to be offset to one side. The wrapping pin constitutes the output terminal of the lighting circuit, and is used for winding and electrically connecting each of the four outer wires w1, w2 derived from the electrodes 20a, 20b of the arc tube, A total of four pairs are provided protruding in the same direction.

In addition, a notch 53c of the cover 53 is located on the narrow space side of the circuit board 40a arranged to be shifted to one side, the straight thin tube 21 is inserted, and the thin tube is disposed close to the inner surface of the base 60. The

The tip of the thin tube 21 enclosing the main amalgam 21a is fixed to the inner surface of the base 60 by a heat conducting member 81 such as silicone resin or epoxy resin, thereby improving the thermal conductivity.

Next, the globe 70 has a shape of a PS (Pear shape type) bulb having a circular cross section used for a general lighting bulb such as an incandescent bulb, and soda lime glass or the like so as to cover the arc tube 1. The glass material is milky white having transparency or light diffusibility, here milky white, and is formed into a smooth curved surface of a glass sphere in a general lighting bulb such as an incandescent bulb.

That is, a spherical portion 71 formed in a substantially spherical shape having a maximum diameter portion 70a on the top end side, and a reduced diameter gradually reduced to a diameter smaller than the diameter of the maximum diameter portion of the spherical portion on the opening end side on the base end side. A base N having a substantially cylindrical shape composed of the diameter portion 72 is integrally formed.

In particular, the arc tube has both ends 10b, 10c of a bulb having a helical portion 10 as described above.
However, the minimum dimension “a” between the opposing inner surfaces facing the inner side of the maximum outer diameter D1 of the helical portion 10 is about 1.
Since it is set to 0 mm, the diameter of the holder 51 is small, and when the globe 70 is put on the arc tube 1, the root portion N of the facing globe 70 is made to follow the small diameter holder and is more constricted. Is formed.

An opening end 73 is formed on the base end side of the globe 70 at the base portion N of the globe 70, and an edge of the opening end is fitted into a recess 51 d formed in the flange 51 c of the holder 51. It is fixed with a heat-resistant adhesive such as resin or epoxy resin.

  Next, a procedure for assembling the bulb-type fluorescent lamp 30 configured as described above will be described. First, the arc tube 1 is supported on the holder 51. That is, the lower ends of both ends 10b and 10c of the arc tube are inserted into the pair of support holes 51a and 51a of the holder 51, and an adhesive is injected from the inside of the holder to fix the both ends of the arc tube to the holder.

Next, the thin tubes 21 and 22 of the arc tube and the outer wires w1 and w2 drawn out to the inside of the holder 51 are passed through the insertion holes 52e of the partition 52, and the pair of circuit boards 40a formed on the inner surface of the partition 52 In the locking grooves 52f and 52f, the circuit board is set in the vertical direction, and both side edges in the width direction are fitted and fixed.

Next, as shown in FIG. 5, in a state where the circuit board 40a is securely fixed to the partition body 52, it is set in an automatic machine for wrapping, and the wrapping tool T is inserted from the recesses 52d and 52d of the partition body. Each of the outer wires w1 and w2 is wound and soldered to the lapping pins 40c provided with a total of four pairs. At this time, since the recesses 52 d and 52 d are formed in the partition body 52, it is not necessary to perform lapping in an unstable state in which the circuit board 40 a is pulled out from the partition body 52.

Incidentally, as in the conventional example shown in FIG. 9 (using the U-shaped arc tube 1 ′), if there is no recess, the wrapping pin 40 c is hidden in the side wall of the cylindrical portion of the partition 52. , Inserting a wrapping tool becomes difficult. For this reason, it is necessary to draw out the circuit board 40a from the partition body 52 (arrow A in the figure) so that the wrapping pin 40c is exposed to the outside from the side wall, and wrapping in this state.

For this reason, lapping is performed in an unstable state in which the circuit board 40a is pulled out from the partition body 52, and automation is difficult, and there is a problem that connection cannot be reliably performed. Furthermore, since the circuit board 40a is returned to the normal position in the partition 52 after lapping (arrow B in the figure), the outer wires w1 and w2 may be loosened and electrical insulation may be insufficiently secured. There is. In FIG. 9 showing the conventional example, the same parts as those in FIGS.

Next, the partition body 52 in which the circuit board 40a is fixed is inserted into the space portion 51b of the holder 51 that supports the arc tube 1 as described above, and the ring-shaped bowl-like shape of the holder 51 is inserted into the bowl-shaped attachment portion 52b of the partition body. The lower part of the part 51c is fitted and fixed with a heat-resistant adhesive such as silicone resin or epoxy resin and integrated.

Further, the integrated partition 52 and holder 51 are inserted into the cover 53. At this time, the hook-like attachment portions 52b of the partition body 52 are fitted while the lower side edges of the circuit board 40a fixed to the partition body 52 are fitted into a pair of locking grooves 53b and 53b formed on the inner surface of the cover 53. It fits into the mounting step 53a, and is fixed and integrated with a heat-resistant adhesive such as silicone resin or epoxy resin.

Thereby, the protrusions 53d and 53d formed on the inner surface of the cover 53 are aligned with the recesses 52d and 52d for inserting the lapping tool formed in the partition 52, and the recess is closed. (Figure 2)
At the same time, the linear thin tube 21 of the arc tube is inserted and locked into a notch 53 c formed on the inner peripheral surface of the lower end opening of the cover 53.

In this state, a heat blocking member 80 made of silicone resin, epoxy resin, or the like is injected from the lower end opening of the cover 53 to fill a space between the inner peripheral surface of the cover and the circuit board 40a and the electronic component 40b.

Next, one lead wire (not shown) connected to the input terminal of the circuit board 40 a is connected to the eyelet 60 c of the base 60, and the other lead wire is formed on the outer peripheral surface of the lower end opening of the cover 53. Place on the mounting part.

In this state, the shell opening of the base 60 is fitted to the outer peripheral surface of the lower end opening of the cover 53 to sandwich the lead wire, and further, the outer periphery of the opening of the shell 60a is connected to the outer peripheral surface of the lower end opening of the cover 53. By caulking and fixing, the other lead wire is electrically connected to the shell 60a.

Before fixing the base 60, the tip of the thin tube 21 accommodated in the base, the circuit board 40.
a, by injecting a heat conductive member 81 such as silicone resin or epoxy resin into the electronic component 40b, etc., and also injecting a heat conductive member into the base, and combining the base 60, The circuit board 40a, the electronic component 40b,... And the inner surface of the base 60 are thermally connected by the heat conducting member 81.

Next, the luminous bulb 1 is covered with the globe 70, and the edge of the opening end 73 of the globe is placed on the holder 51.
It fits in the recessed part 51d formed in the bowl-shaped part 51c, and fixes with heat resistant adhesives, such as a silicone resin and an epoxy resin.

When attaching the globe 70, the inclined portion 51f of the holder 51 can guide the edge of the opening end portion 73 of the globe along the inclined surface and smoothly cover the edge portion of the opening end portion 73 made of glass. The edge is not missing.

As shown in FIG. 3, the bulb-type fluorescent lamp 30 configured as described above has a height H2 of the entire lamp including the base 60 of about 130 mm, an outer diameter D2 of the maximum diameter portion 70a of the globe 70 of about 65 mm, and a neck. The diameter of the constriction (the outer diameter of the holder) D3 is about 44 mm, the rated lamp power including circuit loss is about 21 w, and the total luminous flux is about 1500 lm or more.
It can be used by replacing with a general incandescent bulb equivalent to 0w. In addition, as for the diameter (outer diameter dimension of a holder) D3 of the constriction part of a neck, 40-44 mm is preferable.

The bulb-type fluorescent lamp 30 configured as described above can be used in a downlight-type lighting fixture 90 as shown in FIG. 6, for example. This lighting fixture has a fixture main body 91, and a socket 92 corresponding to an E26-type base and a reflecting plate 93 to which a general incandescent bulb or the like is mounted are attached. The incandescent lamp attached to the socket 92 is attached. Instead of the bulb, the bulb-type fluorescent lamp 30 of the present invention can be mounted.

Even if a bulb-type fluorescent lamp is mounted instead of an incandescent lamp and the lamp is lit, the bulb-type fluorescent lamp 30 is approximated to a general illumination bulb such as an incandescent bulb or downsized to the same shape as described above. Therefore, the root portion is securely attached without being caught by the reflector, and the light distribution of the fixture can be approximated or the same as that of a general lighting bulb such as an incandescent bulb, and is arranged in the lighting fixture. A sufficient amount of light is applied to the reflector 93 in the vicinity of the socket 92, and the appliance characteristics as the optical design of the reflector 93 designed for an incandescent lamp can be obtained.

As described above, according to the light bulb-type fluorescent lamp 30, it is possible to provide a small and highly efficient light bulb-type fluorescent lamp having an appearance similar to or the same shape as a general lighting bulb such as an incandescent light bulb.

As a result, it is possible to provide a light bulb-type fluorescent lamp having versatility that can be substituted for an incandescent bulb as a light source for an incandescent bulb-type lighting fixture, and the application rate to the lighting fixture is further increased. By using it as an alternative, it is possible to provide a power-saving and highly efficient lighting environment.

In particular, in the arc tube 1, both end portions 10b and 10c of the bulb having the spiral portion 10 are opposed to each other at a position inside the maximum outer diameter D1 of the spiral portion 10, and the minimum dimension a between the opposing inner surfaces is set to about 10 mm. Therefore, the diameter of the holder 51 is small, and when the globe 70 is put on the arc tube 1, the base portion N of the globe 70 that faces the globe 70 is formed along the small holder 51 to form a more narrow shape. It is possible to further approximate or have the same shape as a general lighting bulb such as an incandescent bulb.

Even if the base portion N of the globe 70 is formed in a more constricted shape, the holder 51 is small and downsized, so that the holder portion is not reflected in the globe 70 as a shadow and the appearance is deteriorated. I don't have to.

Furthermore, since the holder 51 has a substantially disk shape in which the corners of the disk surface are cut out to form the inclined portions 51f, the both end portions 10b and 10c of the arc tube face the inclined portions 51f with the corners cut out. Light that is supported and emitted from the vicinity of both ends (near the electrodes) is emitted downward without being blocked by the corners of the holder, and the root portion N of the globe 70 does not become a dark portion, and approximates an incandescent light bulb. Or, illumination with the same light distribution can be performed.

In particular, the portion near the electrode that becomes the root portion includes a portion that does not emit light, and a dark shadow is likely to appear. If only the root portion is thinned, the shadow is extremely likely to be formed, but the inclined portion 51f is near the both ends of the arc tube 1 It is possible to emit light sufficiently by effectively utilizing the light. At the same time, the holder 51 has no corners, and the corners are not reflected in the globe 70 as a shadow, and the appearance is not deteriorated.

Further, the spiral portion 10 of the arc tube 1 is located at the center of the lamp, and a long discharge path composed of the spiral portion is ensured, so that the luminous flux can be increased and the luminous efficiency can be improved. High-efficiency lighting can be performed while providing.

In addition, as described above, both end portions 10b and 10c of the valve having the spiral portion 10 are opposed to each other at an inner position from the maximum outer diameter D1 of the spiral portion 10, and the minimum dimension a between the opposing inner surfaces is set to about 10 mm. Therefore, the diameter of the holder 51 is small, and the thin tube 21 of the arc tube can be a straight thin tube without being bent along the inner surface of the base as shown in Patent Document 2 of the related art. .

As a result, it is not necessary to bend the capillary tube, it is possible to shorten the length, it is possible to further diffuse the amalgam and further improve the luminous flux rise characteristics, at the same time, the workability of the capillary tube is improved, Capillary strength also increases. Further, since the thin tube 21 is inserted and locked in the notch 53c formed in the inner peripheral surface of the lower end opening of the cover 53, it can be reliably supported and can be prevented from being damaged.

At the same time, the thin tube 21 can be arranged at a position closer to the inner surface of the base 60 while maintaining a straight shape, and the thermal connection between the distal end portion of the thin tube and the inner surface of the base can be improved. The heat radiation efficiency for lowering the temperature of 21a is improved. At the same time, it is possible to reduce the coating amount of the heat conducting member 81 such as silicone resin or epoxy resin for thermal connection.

In addition, since the holder 51 that supports the arc tube 1 is made of aluminum metal and the hook-shaped portion 51c that is exposed on the outer surface is integrally formed, the heat of the arc tube is effectively radiated to the outside, and the lighting circuit As a result, the reliability of the electronic component can be improved.

Moreover, since the recessed part 52d and 52d part for lapping tool insertion were formed in the partition 52,
Without simply pulling out the circuit board 40a as in the prior art, with a simple configuration that only forms the recess,
Lapping can be performed in a state of being securely fixed to the partition. As a result, automation is possible, a step of shifting the circuit board is not necessary, reliable electrical connection can be performed, wiring work is facilitated, and cost can be reduced.

Furthermore, since the outer wires w1 and w2 are not loosened, it is possible to ensure sufficient electrical insulation, and further, it is possible to omit covering the outer wire with the insulating tube.

In addition, since the recesses 52d and 52d are closed by the projecting pieces 53d and 53d of the cover 53, the wrapping pin portion is mainly electrically insulated, and at the same time, heat from the arc tube enters the lighting circuit. In addition, the reliability of electronic components can be further improved.

In this embodiment, a white resin material such as silicone resin is applied in an inclined manner by utilizing the empty space on the upper surface of the holder formed by setting the minimum dimension a between the opposing inner surfaces of both end portions of the valve to about 10 mm. Thus, the second inclined portion is formed.

That is, as shown in FIG. 7, it descends as it goes to the outer periphery from the both ends of the bulb 2 to the inclined portion 51f on the upper surface of the metal holder 51 holding the arc tube 1 and taking measures against heat dissipation. Then, a member having a good thermal conductivity such as silicone resin is applied so as to be connected to the inclined portion, thereby forming the second inclined portion 51f ′. Thereby, the heat of the arc tube 1 is more easily conducted to the metal holder 51.

Moreover, the light radiated | emitted from the arc_tube | light_emitting_tube 1 is reflected by the white inclined surface of a silicone resin, and is irradiated to the neck part of the globe 70, and the shadow of a neck part can be made not conspicuous.

The light transmittance of the neck portion H3 of the globe 70 in FIG. 7 (in this embodiment, the height dimension from the opening end 73 of the globe to the upper portion of the holder 51 and the linear portion of the reduced diameter portion 72) is
It is 1-5% lower than the light transmittance on the top end side of the globe.

The height dimension H3 at this time is 10 to 20 mm. As a result, a narrow gap is formed between the holder 51 and the globe neck portion, and even if the light transmittance of the neck portion is reduced by 1 to 5%, there is no influence on the total luminous flux, and the shadow of the neck portion is lost. It can be inconspicuous, and there is no possibility that the total luminous flux will decrease.

In the present embodiment, the inclined portion 51f may be omitted, and the inclined portion may be configured only by the second inclined portion 51f ′ formed by applying a member having good thermal conductivity such as silicone resin. . In addition, in FIG. 7 which shows a present Example, the same code | symbol was attached | subjected and demonstrated to FIG. 1-FIG. 6 of Example 1. FIG.

 In this embodiment, it is possible to make the portion corresponding to the base portion of the lamp as small as possible by reducing the dimension from the surface of the panel where the holder supports the arc tube to the outer peripheral surface part of which is exposed to the outside. The configuration will be described with reference to FIG. 10, the same parts as those in FIGS. 1 to 9 in the first and second embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

 In the arc tube 1 of the present embodiment, the maximum outer diameter dimension D1 of the spiral portion 10 is 36 to 40 mm, in this embodiment about 40 mm, the outer diameter dimension D3 of the holder 51 is 40 to 44 mm, and in this embodiment about 44 mm. Configure.

 Furthermore, from the upper surface, which is the surface on which the holder 51 supports the arc tube 1, the outer peripheral surface portion A where a part of the holder 51 is exposed outward, that is, the portion that supports the globe 70 on its inner peripheral portion, in other words, The height dimension h4 to the apex of the recess 51d formed on the inner surface of the ring-shaped bowl-shaped portion 51c is 4 to 8 mm, preferably 5 to 7 mm, and in this embodiment, about 6 mm. The height dimension h4 is a height dimension from the portion where the light emitted from the arc tube 1 toward the outer peripheral surface portion A of the holder 51 is shielded to the board surface.

 When the height dimension h4 is less than 4 mm, that is, when the height dimension to the board surface of the holder 51 is reduced, the height dimension of the support portion for supporting the arc tube 1 in the holder 51 is reduced, and the arc tube 1 is attached to the holder. 51 cannot be reliably supported. Or if the height of the vertex of the recessed part 51d is made high, the ratio which the light radiated | emitted from the arc_tube | light_emitting_tube 1 toward the outer peripheral surface part A of the holder 51 will become high.

 Further, when the height dimension h4 exceeds 8 mm, that is, when the height of the apex of the recess 51d is lowered, the depth dimension of the recess 51d for supporting the globe 70 is reduced, and the globe 70 can be reliably supported. become unable. Or if the height dimension to the board surface of the holder 51 is increased, the height dimension H2 of the entire length of the lamp is increased and it is difficult to reduce the size.

 The other dimensions of the arc tube 1 in this example are the same as in Example 1, the height dimension H1 is about 76 mm, and the dimension a between the inner surfaces facing the electrode sealing portions 20 and 20 'is about 10 mm. The dimension b between the outer surfaces of the opposing electrode sealing portions 20 and 20 ′ is about 30 mm, and the discharge path length between the pair of electrodes 22a and 20b is about 580 mm.

 The light-emitting tube 1 and the holder 51 configured as described above are assembled in accordance with the same procedure together with the lighting device 40 and the globe 70 configured in the same manner as in the first embodiment, so that the light bulb shaped fluorescent lamp 30 is configured. In this bulb-type fluorescent lamp, the height H2 of the entire lamp including the base 60 is about 130 mm, the outer diameter D2 of the maximum diameter portion 70a of the globe 70 is about 65 mm, and the diameter of the neck constriction (outer diameter of the holder) D3 is about 44 mm, the rated lamp power including circuit loss is about 21 w, the total luminous flux is about 1500 lm or more, and it can be used by replacing with a general incandescent bulb equivalent to 100 w. And like Example 1, it is mounted | worn with and used for the socket 92 of the lighting fixture 90 which is a downlight, for example.

 In order to investigate the characteristics of the bulb-type fluorescent lamp configured as described above, the present inventors conducted a test for comparison with a conventional product. The result is shown in the graph of FIG. That is, the following was set as a conventional product for comparison.

 Experimental product No. 1: A bulb-type fluorescent lamp having a configuration disclosed in Patent Document 2.

 Experimental product No. 2: Experimental product NO. A bulb-type fluorescent lamp with a configuration in which the input power is lowered by changing the constant of the lighting circuit of 1.

 Experimental product No. 3: Experimental product NO. 2 is a bulb-type fluorescent lamp in which the maximum outer diameter of the spiral portion of the arc tube is the same as that of the present embodiment, that is, D1 is about 40 mm.

 Experimental product No. 4 is a bulb-type fluorescent lamp of this example. 3 and the holder 51 has an outer diameter D3 of about 44 mm and an h4 height of about 6 mm.

 The table shown in FIG. 11C is a table showing combinations of the “current”, “new circuit”, and “prototype” experimental products for each component of the arc tube 1, the holder 51, and the lighting circuit 40. .

 “Current” is a bulb-type fluorescent lamp having the configuration shown in Patent Document 2, “New circuit” is a bulb-type fluorescent lamp having a configuration in which the input power is reduced by changing the constant of the lighting circuit, and “Prototype” is that of this embodiment. It is a bulb-type fluorescent lamp. No. in the table. Indicates the number of each experimental product, and at the same time, the horizontal axis of each graph (a) (b) (d) is displayed.

 In addition, each experimental product was examined for each characteristic in a state where it was continuously lit for 20 hours. The numerical value enclosed by the square in each graph is the No. of the experimental product. It is the rate of increase or decrease (%) by comparing numerical values in order.

 First, the efficiency improvement investigation was performed in each bulb-type fluorescent lamp having the above configuration. The result is shown in FIG. As is clear from this, the experimental product No. 2 to No. 3, that is, by optimizing the arc tube with a helical outer diameter D1 of about 40 mm, the lamp efficiency (lm / w) was improved by 2.9% and about 3%.

 The experimental product No. 3 to No. 4, that is, the outer diameter D3 of the holder 51 is set to about 44 mm, and the h4 height is set to about 6 mm, so that the lamp efficiency is improved by 7.4% and about 7%.

 11 (b) shows the investigation of the improvement of the total luminous flux, and FIG. 11 (d) shows the investigation of the power reduction. As can be seen from each figure, the light bulb type fluorescent lamp No. According to No. 4, even if the power (Wh / w) is reduced (20.3 W), the total luminous flux is almost equivalent to the conventional product with high power (experimental product No. 1: power 23.4 W and total luminous flux 1429 lm). The total luminous flux of 1412 lm can be obtained.

 As described above, according to this embodiment, the maximum outer diameter dimension D1 of the spiral portion 10 is reduced to about 40 mm, so that the lamp efficiency can be improved by about 3%. In addition, since the outer diameter D3 of the holder 51 is about 44 mm and the h4 height is about 6 mm, the lamp efficiency can be improved by about 7%. Furthermore, a total luminous flux almost equal to that of the current product can be obtained with low power. In addition, the power can be reduced even with the same total luminous flux as the current product.

 The outer diameter dimension D3 of the holder 51 is configured to 44 mm, and the dimension h4 from the upper surface, which is the board surface on which the holder 51 supports the arc tube 1, to the outer peripheral surface portion A where a part of the holder is exposed outward is about 6 mm. Thus, the holder 51 can be made small, and when the globe 70 is put on the arc tube 1, the base portion N of the globe 70 that faces the globe 70 is set along the small holder 51 to form a more constricted shape. It is possible to approximate or have the same shape as a general lighting bulb such as an incandescent bulb.

 In addition, the absorption of light by the holder 51 is reduced, in other words, the ratio at which the light emitted from the arc tube 1 toward the outer peripheral surface A of the holder 51 is shielded by the holder 51 can be reduced. Light emitted from the vicinity of the electrode of the tube 1 is emitted downward without being blocked by the holder 51, and the root portion N of the globe 70 does not become a dark portion, and is similar to an incandescent bulb or the same light distribution Illumination with can be performed.

 As described above, the present embodiment may be applied to the holder having the inclined portion 51f or the second inclined portion 51f ′ shown in the first and second embodiments. In addition, other configurations, operations, functions, and modifications in the present embodiment are the same as those in the first and second embodiments.

 In this embodiment, by forming the maximum outer diameter of the cylindrical portion of the holder smaller than the maximum outer diameter of the helical portion of the arc tube, the portion corresponding to the root portion of the lamp can be made as small as possible. The structure will be described with reference to FIGS. 12 to 14, the same reference numerals are assigned to the same portions as in FIGS. 1 to 11 in the first to third embodiments, and detailed description thereof is omitted.

  Incidentally, in the conventional bulb-type fluorescent lamp shown in Patent Document 2, the maximum outer diameter of the disc-shaped holder and the maximum outer diameter of the spiral portion of the arc tube are almost the same, so the outer diameter of the cover portion is also the same. In addition, it was not possible to obtain an external shape in which the outer diameter was reduced toward the base such as a general incandescent lamp. In addition, since the base end portion of the globe is also separated from the base, the cover portion that does not emit light is large in the vicinity of the base, and the lighting appearance is considerably different from the image of a general incandescent light bulb.

  This embodiment has an external shape that approximates that of a general incandescent bulb by reducing the outer diameter of the cover portion, and reduces the proportion of the cover portion that does not emit light as much as possible to bring the lighting appearance closer to the image of a general incandescent bulb. It is configured to be able to.

 That is, in the same manner as in the first embodiment, the arc tube 1 is bent at the central region of the bulb 2 so that one straight tubular bulb 2 is divided into two equal parts. Both ends of the bulb 2 are formed in a spiral shape as the top portion 10a. The maximum outer diameter D4 of the helical portion 10 of the arc tube 1 is about 35 to 46 mm, and is about 37 mm in this embodiment.

 In addition, the holder 51 is formed of a metal material having good thermal conductivity such as aluminum or an aluminum alloy, as in the first embodiment, and is one end side from the peripheral portion of the disk-shaped support portion B and the support portion B. And a cylindrical tube portion C that protrudes outward, and an annular outer peripheral surface portion A that protrudes outward from one end side of the tube portion C. The maximum outer diameter W of the holder 51 is 30 to 40 mm, and is about 35 mm in this embodiment. Thereby, the clearance dimension d between the peripheral side surface of the cylindrical part C of the holder 51 and the outer peripheral edge of the arc tube 1 can be set to 1 to 5 mm (2 to 10 mm on both sides).

  The support portion B is formed with a pair of support holes 51a and 51a through which the pair of end portions 10b and 10c of the arc tube 1 are inserted. By injecting an adhesive S such as a silicone resin or an epoxy resin from the inside of the cylindrical portion C in a state where the pair of end portions 10b and 10c of the arc tube 1 are inserted into the pair of support holes 51a and 51a, light is emitted. The tube 1 is bonded and fixed to the holder 51.

  One end side of the outer peripheral surface portion A is fitted and attached to the cover 53, and the other end side is formed to expand to one end side, and the globe 70 is attached to the other end side. Therefore, the outer peripheral surface portion A is exposed to the outside from between the cover 53 and the globe 70, and constitutes a part of the appearance of the bulb-type fluorescent lamp 30 together with the cover 53 and the globe 70. Since the surface of the holder 51 is made of aluminum, the light reflectivity is high, and the surface of the support portion B, the surface of the cylindrical portion C, and the like are configured as reflection surfaces.

 In addition, the globe 70 is formed in a smooth curved surface close to the shape of a glass bulb of a general lighting bulb such as an incandescent bulb by a material such as transparent or light diffusing glass or synthetic resin, as in the first embodiment. ing. An opening end 73 is formed at one end of the globe 70, and the edge of the opening end 73 is fitted inside the outer peripheral surface A of the holder 51, and is adhered by an adhesive having viscosity such as silicone resin or epoxy resin. It is fixed.

  The shortest distance e between the inner surface of the globe 70 and the arc tube 1 is formed to be 2 to 5 mm. When a lateral vibration is applied to the bulb-type fluorescent lamp 30, the arc tube 1 also vibrates in the lateral direction. However, since the arc tube 1 vibrates with the holder 51 as a fulcrum, the amplitude on the top 10a side increases. From this, by setting the shortest distance e to 2 to 5 mm, the top portion 10a side of the arc tube 14 is prevented from coming into contact with the inner surface of the globe 70 and being damaged even when the bulb-type fluorescent lamp 30 vibrates in the lateral direction. be able to.

 The arc tube 1, the holder 51, and the globe 70 configured as described above are assembled in accordance with the same procedure together with the lighting device 40 configured in the same manner as in the first embodiment to configure the light bulb shaped fluorescent lamp 30. This bulb-type fluorescent lamp has a maximum outer diameter D2 of the globe 70 of about 65 mm, a total height H2 of the lamp including the base 12 of about 133 mm, a lamp power including circuit loss of 23 W or less, and a total luminous flux of about It becomes 1500 lm or more and can be used by replacing with a general lighting bulb equivalent to 100 W. And like Example 1, it is mounted | worn with and used for the socket 92 of the lighting fixture 90 which is a downlight, for example.

  In the bulb-type fluorescent lamp 30 configured as described above, the maximum outer diameter W of the cylindrical portion C of the holder 51 is formed to be smaller than the maximum outer diameter D4 of the helical portion 10 of the arc tube 1. The outer peripheral surface portion A of the holder 51 and the outer diameter of the cover 53 can be formed small, and a compact bulb-type fluorescent lamp 30 whose outer diameter is reduced toward the base 60 like a general incandescent bulb. Can be realized.

  Also, the peripheral side surface of the cylindrical portion C of the holder 51 is irradiated with the radiated light of the arc tube 1, and the periphery of the cylindrical portion C is reflected by the direct light irradiated from the vicinity of the peripheral side surface or the reflected light from the peripheral side surface. Since it also emits light, the lighting appearance can be brought close to the image of a general incandescent light bulb, and the merchantability can be improved.

  Thus, the bulb-type fluorescent lamp 30 of the present embodiment can have substantially the same appearance as a general lighting bulb such as an incandescent bulb, and can obtain a stable luminous flux and luminous efficiency regardless of the orientation of the bulb-type fluorescent lamp. It is possible to improve the application rate to lighting fixtures that use general lighting bulbs such as incandescent bulbs.

 As described above, the present embodiment may be applied to the holder having the inclined portion 51f or the second inclined portion 51f ′ shown in the first and second embodiments. Moreover, you may apply to the holder which comprised the dimension h4 small from the board surface which supports the arc_tube | light_emitting_tube 1 shown in Example 3 to the outer peripheral surface part A to which some are exposed outside. In addition, other configurations, operations, functions, and modifications in the present embodiment are the same as those in the first, second, and third embodiments.

  Next, modifications of the above embodiments will be described. In each embodiment, the light bulb shaped fluorescent lamp corresponding to the incandescent lamp 100W type is configured. However, for example, a low watt light bulb shaped fluorescent lamp corresponding to the 40W, 60W type or the like may be configured. Or you may make it comprise a higher watt bulb-type fluorescent lamp.

Further, a globeless type bulb-type fluorescent lamp in which the arc tube is exposed may be configured. In this case as well, an appearance size similar to or the same as that of a general lighting bulb such as an incandescent bulb can be obtained, and the application rate to various lighting fixtures can be further improved.

Further, as shown in FIG. 8, the cover member 50, for example, the circuit board 40 a of the lighting device,
The holder 51 may be directly supported by the synthetic resin holder 51 having electrical insulation, in other words, the holder 51 and the partition body may be formed integrally with the synthetic resin, and the partition body may be omitted. This is, for example,
It is suitable for low watt bulb type fluorescent lamps corresponding to incandescent bulbs 40W and 60W types. In FIG. 8, the same portions as those in FIGS.

Moreover, although the globe 70 is made of a glass material, it may be made of a material such as translucent polycarbonate.

In addition, concave portions 52d and 52d are formed in the partition 52, and the outer wires w1 and w of the arc tube are formed.
2 and the wrapping 40c of the circuit board 40a are electrically connected by wrapping, but the electrical connection is not limited to wrapping. For example, an outer wire is soldered or welded to a wire constituting a terminal portion provided on the circuit board May be used, or may be connected directly to the circuit pattern of the circuit board by soldering or welding.

Further, as shown in FIG. 8, each of the configurations and methods for forming the recesses 52d and 52d in the partition 52 and electrically connecting the outer wire of the arc tube and the terminal portion of the circuit board 40a is a spiral. For example, the present invention may be applied to a bulb-type fluorescent lamp having one or a plurality of U-shaped arc tubes 1 ′ other than a bulb-type fluorescent lamp using a light-emitting tube having a shape portion.

In addition, the configuration in which the thin tube 21 is inserted and locked in the notch 53c formed on the inner peripheral surface of the lower end opening of the cover 53, and the thin tube 21 is arranged in a position closer to the inner surface of the base 60 while being linear. In addition to the light bulb-type fluorescent lamp using a light-emitting tube having a spiral portion, for example, the present invention may be applied to a light bulb-type fluorescent lamp having one or a plurality of U-shaped light-emitting tubes.

Further, a notch inclined portion 51f is formed at the corner of the disk surface of the holder 51 having a substantially disk shape, or a second inclined portion 51f 'is added, or only the second inclined portion 51f' is used to form the lamp root portion. The configuration for eliminating the dark portion may be applied to, for example, a light bulb shaped fluorescent lamp having one or a plurality of U-shaped light emitting tubes other than the light bulb shaped fluorescent lamp using a light emitting tube having a spiral portion.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the scope of the present invention.

The front view which shows the arc tube of 1st embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS The longitudinal cross-sectional view which shows the lightbulb-type fluorescent lamp of 1st embodiment of this invention. The AA sectional view in Drawing 2 showing a light bulb form fluorescent lamp similarly. The cover of a bulb-type fluorescent lamp is also shown, (a) is a perspective view showing the cover as seen from above, and (b) is a perspective view showing the cover as seen from below. The perspective view which similarly shows the lapping process of a bulb-type fluorescent lamp. The figure which shows the lighting fixture using the lightbulb-type fluorescent lamp of this invention in cross section. Sectional drawing corresponding to FIG. 3 which shows the lightbulb-type fluorescent lamp in 2nd embodiment of this invention. The perspective view which shows the modification of a lightbulb-type fluorescent lamp with the modification of a lapping process. The perspective view which shows the lapping process of the conventional bulb-type fluorescent lamp. Sectional drawing corresponding to FIG. 2 which shows the lightbulb-type fluorescent lamp in 3rd embodiment of this invention. Similarly, the experimental results conducted to investigate the characteristics of the bulb-type fluorescent lamp are shown, (a) is a graph showing the results of the efficiency improvement investigation, (b) is a graph showing the results of the total luminous flux improvement investigation, (d ) Is a graph showing the results of a power drop investigation, and (c) is a table showing combinations of each of the arc tube, holder, and circuit components in each of the “current”, “new circuit”, and “prototype” experimental products. Medium No. The number of each experimental product is shown, and the horizontal axis of each of the graphs (a), (b), and (d) is displayed at the same time. Sectional drawing corresponding to FIG. 3 which shows the lightbulb-type fluorescent lamp in 4th embodiment of this invention. Sectional drawing corresponding to FIG. 2 which similarly shows a lightbulb-type fluorescent lamp. The partial sectional view explaining the dimensional relationship of the arc tube and holder of a bulb-type fluorescent lamp.

Explanation of symbols

1: Arc tube 2: Bulb 10: Spiral part 10b, 10c: Both end parts of the bulb 20, 20 ': Electrode sealing part 20a, 20b: Electrode 21: Narrow tube 21a: Mercury emitter 30: Bulb-type fluorescent lamp 40: Lighting device 50: Cover member 51: Holder A: Outer peripheral surface portion 51c: Hook-shaped portion 51f: Inclined portion 52: Partition body 53: Cover 60: Base 70: Globe 90: Lighting fixture 91: Appliance main body 92: Socket

Claims (6)

At least a part of the bulb is formed with a bulb, electrodes are sealed at both ends of the bulb to form a discharge path inside, and the bulb both ends are located on the inner side of the maximum outer diameter of the helix. An arc tube facing and having a minimum dimension between the opposing inner surfaces of 5 to 15 mm;
A lighting device for lighting the arc tube;
A cover member that supports the arc tube and in which the lighting device is disposed;
A base supported by a cover member;
A bulb-type fluorescent lamp characterized by comprising: The arc tube has a helical portion having a maximum outer diameter of 36 to 40 mm, and the cover member has a holder made of a member having a part exposed to the outside and having thermal conductivity, and the holder has an outer diameter of 40 mm. 2. The light bulb shaped fluorescent lamp according to claim 1, wherein the dimension of the holder is 4 to 8 mm, and the dimension from the surface of the panel where the holder supports the arc tube to the outer peripheral surface part of which is exposed to the outside is 4 to 8 mm. 2. The valve according to claim 1, wherein at least one electrode sealing portion is provided with a linear thin tube having one end communicating with the inside of the bulb and the other end sealed and enclosing a mercury emitter. 2. The bulb-type fluorescent lamp according to 2. The cover member is composed of a holder for supporting an arc tube, a part of which is exposed to the outside and having heat conductivity, a partition for supporting a circuit board of a lighting device, and a cover for supporting a base. The bulb-type fluorescent lamp according to any one of claims 1 to 3, wherein the bulb-type fluorescent lamp is provided. The holder has a substantially disk shape with a notch formed at a corner of the disk surface, and has a hook-like part exposed to the outside on the outer peripheral part, and supports the arc tube on the disk surface and a glove on the inner surface of the hook-like part. The bulb-type fluorescent lamp according to claim 4, wherein: An instrument body;
A socket provided on the instrument body;
The bulb-type fluorescent lamp according to any one of claims 1 to 5, wherein a base is connected to the socket;
The lighting fixture characterized by comprising.

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